Oracle Installation and Unix Question

25. What is dynamic Intimate shared Memory (DISM)?
 
  • DISM in Solaris is similar to huge pages in Linux.
  • It provides larger chunks of memory for System Global Area (SGA) to avoid paging.
  • It is very helpful to use DISM for SGA to improve the performance of Oracle database.
  • DISM can support up to 4 MB page size.
 
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26. How can you execute UNIX commands from SQL plus?
  You can use the host command to execute the UNIX commands from SQL plus.
 
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27. Which command would you use to check how many memory segments are acquired by Oracle instances?
  You can use the ipcs –m UNIX command to check the memory segments that are acquired by Oracle instances.
 
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28. Give the command to list the files in the UNIX directory to list hidden files?
  The ls –ltra
 
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